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Posted to dev@flink.apache.org by "Purushottam Sinha (Jira)" <ji...@apache.org> on 2026/07/10 15:22:00 UTC
[jira] [Created] (FLINK-40118) Web dashboard: SubTask TimeLine shows "N - undefined" instead of the task endpoint
Purushottam Sinha created FLINK-40118:
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Summary: Web dashboard: SubTask TimeLine shows "N - undefined" instead of the task endpoint
Key: FLINK-40118
URL: https://issues.apache.org/jira/browse/FLINK-40118
Project: Flink
Issue Type: Bug
Components: Runtime / Web Frontend
Reporter: Purushottam Sinha
Problem
The job Timeline tab's SubTask view labels each subtask bar 0 - undefined, 1 - undefined, etc. instead of showing the host/endpoint the subtask ran on.
Evidence
- flink-runtime-web/web-dashboard/src/app/pages/job/timeline/job-timeline.component.ts:135,141 builds the label as `${task.subtask} - ${task.host}`
- src/app/interfaces/job-timeline.ts:25 still declares the field as host: string, so TypeScript compiles clean while task.host is undefined at runtime
- Root cause is backend/frontend drift, not a day-one bug: host was valid when the dashboard was built in 2019 (dcd92958c58c). PR apache/flink#23465 (FLINK-33147, 2023-11-09) added endpoint alongside host, deprecating the latter. PR apache/flink#25436 (FLINK-36355, merged 2024-10-01, commit 0b4de216d98 "Remove deprecated host") then deleted host from the REST response entirely — that PR touched only backend Java classes and never updated the Angular frontend, so task.host has read undefined ever since
- Confirmed still present on current master
Proposed fix
- job-timeline.ts:25: host: string → endpoint: string
- job-timeline.component.ts:135,141: ${task.host} → ${task.endpoint}
Acceptance
- SubTask TimeLine bars for a running job read N - localhost:PORT instead of N - undefined
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